consecutive blockquotes shouldn't be merged

[de-code]

It seems consecutive quotes (separated by two line feeds) are merged if there isn't any other text in between.

e.g.:

from markdown2 import markdown
print(markdown('> quote 1\n\n> quote 2'))

outputs:

<blockquote>
  <p>quote 1</p>
  
  <p>quote 2</p>
</blockquote>

expected something like:

<blockquote>
  <p>quote 1</p>
</blockquote>

<blockquote>
  <p>quote 2</p>
</blockquote>

Adding non-quoted text in-between results in separate blockquotes as expected:

print(markdown('> quote 1\n\nno quote\n> quote 2'))

<blockquote>
  <p>quote 1</p>
</blockquote>

<p>no quote</p>

<blockquote>
  <p>quote 2</p>
</blockquote>

Replacing no quote in the above code with a whitespace removes that separation again.

The same seems to be true for python-Markdown.

In GitHub renders markdown as expected:

quote 1

quote 2

[nicholasserra]

Fixed in #356